assailable
compromising
defenceless
defenseless
endangered
indefensible
insecure
open
penetrable
susceptible
threatened
undefendable
undefended
under attack
under fire
unguarded
unsafe
weak
aidless
answerable for
apt to
attackable
beatable
breakable
brittle
brittle as glass
capable of
conquerable
crackable
crisp
crispy
crumbly
crushable
delicate
dependent on
exposed to
expugnable
fatherless
fissile
flimsy
fracturable
fragile
frail
frangible
friable
friendless
guideless
helpless
in danger of
incident to
lacerable
leaderless
liable to
likely to
motherless
naked to
obliged to
open to
pregnable
prone to
ready for
responsible for
scissile
shatterable
depress
desirable
naive
sensitive
shy
unable
uncomfortable
unprotected
unstable
vital
invulnerable